Method and apparatus for monitoring a charged particle beam
First Claim
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1. An ionization chamber comprising:
- a first electrode plane comprising a first plurality of conductive elements;
a second electrode plane substantially parallel to said first electrode plane, the second electrode plane comprising a second plurality of conductive elements oriented substantially orthogonally to first plurality of conductive elements;
a flexible hermetic seal preventing mixing of a gas within said ionization chamber with surrounding ambient gases;
one or more environmental sensors integrated within said ionization chamber and sensing one or more corresponding aspects of said gas within said ionization chamber; and
a desiccant cartridge disposed in the interior of said ionization chamber.
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Abstract
An ionization chamber with spatial distribution electrode for monitor hadron beam currents used for therapeutic treatment. Ionization chamber comprises humidity control, environmental sensing and real-time correction thereof. A flexible hermetic seal provide for ambient pressure equalization. X-Y electrode planes measure Gaussian distribution of incident particle beam. Methods described herein are suitable to fabricate highly accurate, low scattering electrodes with high spatial resolutions.
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Citations
19 Claims
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1. An ionization chamber comprising:
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a first electrode plane comprising a first plurality of conductive elements; a second electrode plane substantially parallel to said first electrode plane, the second electrode plane comprising a second plurality of conductive elements oriented substantially orthogonally to first plurality of conductive elements; a flexible hermetic seal preventing mixing of a gas within said ionization chamber with surrounding ambient gases; one or more environmental sensors integrated within said ionization chamber and sensing one or more corresponding aspects of said gas within said ionization chamber; and a desiccant cartridge disposed in the interior of said ionization chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of fabricating an ionization chamber electrode, comprising:
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tensioning a metalized polymer sheet onto a rigid frame; ablating a conductive material on said metalized polymer sheet to form a plurality of conductive elements disposed on a surface of said metalized polymer sheet; connecting a plurality of electrical connections corresponding to said plurality of conductive elements; and
,providing an electrically insulating material around said ionization chamber electrode. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification